40123 (/1000)
  + 50456 (/1000)
  + 20789 (/1000)
    -------------
    overflow

##</code><code>##

    40123 (/1000)  =>    04012 (/100)
    50456 (/1000)  =>  + 05046 (/100)
    20789 (/1000)  =>  + 02079 (/100)
                         ------------
                         11137 (/100)     (111.370 instead of 111.368)

##</code><code>##

    40123 (/1000)  =>    00040 (/1)
    50456 (/1000)  =>  + 00050 (/1)
    20789 (/1000)  =>  + 00021 (/1)
    ...                  ...
                         ----------
                         00111 (/1)       (111.000 instead of 111.368)